fixup! Upgrade to install-qt-action@v4

Author: hasselmm

.github/workflows/integration.yaml

@@ -87,12 +87,11 @@ jobs:
           version: ${{ matrix.qt-version}}
           target:  ${{ matrix.configuration.target || 'desktop' }}
           tools:   ${{ matrix.configuration.tools || '' }}
-          arch:    ${{ (startsWith(matrix.qt-version, '5.') && matrix.configuration.arch-qt5)
-                    || (startsWith(matrix.qt-version, '6.8.') && matrix.configuration.arch-qt6_8)
-                    || (startsWith(matrix.qt-version, '6.8.') && 'not-found-with-qt-6.8')
-                    || matrix.configuration.arch-qt6
+          arch:    ${{ (startsWith(matrix.qt-version, '6.8.') && matrix.configuration.arch-qt6_8)
+                    && (startsWith(matrix.qt-version, '6.')   && matrix.configuration.arch-qt6)
+                    && (startsWith(matrix.qt-version, '5.')   && matrix.configuration.arch-qt5)
                     || matrix.configuration.arch
-                    || 'not-found-at-all' }}
+                    || '' }}
           cache: true
 
       - name: Install Ninja